He has a background in web development and combines his programming capabilities with a passion for social marketing to study social media behavior from a data-backed position and teach marketers scientifically grounded best practices. One of the first marketers at HubSpot, he spent 6 years at the company, watching it grow from startup to big, public company.

Webinars in his “Science of…” series have drawn upwards of 30,000 registrants. And he holds the Guinness World Record for the largest webinar ever. His Science of ReTweets Report analyzes the when, why and how Twitter users ReTweet things, and explains how marketers can effectively get more ReTweets, and TweetPsych is linguistic analysis tool he built that allows users to generate psychological profiles of any other Twitter user or list based on the contents of their Tweets.

What other people have said:

“His presentations, webinars and data have made him the web’s pre-eminent social media scientist, and someone whose expertise is backed by more data than nearly anyone else in the marketing field.”-Rand Fishkin (SEOMoz)

“Zarrella calls himself “The Social Media and Viral Marketing Scientist” and is one of the few people on the web with the credentials to back up such a bold claim.”-Marshall Kirkpatrick (ReadWriteWeb)

Dan Zarrella

Dan Zarrella is the award-winning social media scientist and author of four books: “The Science of Marketing,” “Zarrella’s Hierarchy of Contagiousness,” “The Social Media Marketing Book” and The Facebook Marketing Book.